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Westport Innovations Inc. Intends to Offer Common Shares

published: November 3, 2010

VANCOUVER, BC — Westport Innovations Inc. (TSX:WPT / NASDAQ:WPRT) announced today its intent to sell its common shares in the United States and Canada pursuant to a preliminary prospectus supplement to its base shelf prospectus dated July 28, 2009. Proceeds of an offering are expected to be used by the Company to further its business objectives of developing technology and relationships in new and adjacent market opportunities with OEMs focused on light-duty industrial and automotive and heavy-duty and high horsepower applications. Any remaining net proceeds are expected to be used for general corporate purposes, including working capital requirements, infrastructure development, market creation activities, potential acquisitions of businesses, technologies or other assets, debt repayments, general and administrative expenses, supply chain development and capital expenditures including new facilities and equipment The completion of an offering is subject to negotiation of an underwriting agreement between Westport and possible underwriters, satisfaction of customary underwriting closing conditions and the acceptance or approval of the Toronto Stock Exchange.

This press release shall not constitute an offer to sell or the solicitation of an offer to buy, nor shall there be any sale of the common shares of Westport in any jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such jurisdiction.

About Westport

Westport engineers the world's most advanced natural gas engines and vehicles. More than that, we are fundamentally changing the way the world travels the roads, rails and seas. We work with original equipment manufacturers worldwide from design through to production, creating products to meet the growing demand for vehicle technology that will reduce both emissions and fuel costs. To learn more about our business, visit westport.comsubscribe to our RSS feed, or follow us on Twitter @WestportDotCom.

Cautionary Note Regarding Forward Looking Statements

This document contains forward-looking statements, including statements regarding the demand for our products, the future success of our business and technology strategies, investment, cash and capital requirements, intentions of partners and potential customers, the performance and competitiveness of our products and expansion of product coverage, future market opportunities, speed of adoption of natural gas for transportation, growth in demand as a result of new emission standards and terms of future agreements. These statements are neither promises nor guarantees, but involve known and unknown risks and uncertainties and are based on assumptions that may cause our actual results, levels of activity, performance or achievements to be materially different from any future results, levels of activities, performance or achievements expressed in or implied by these forward looking statements. These risks and assumptions include risks and assumptions related to our revenue growth, operating results, industry and products, the general economy, conditions of and access to the capital and debt markets, governmental policies and regulation, technology innovations, fluctuations in foreign exchange rates, global government stimulus packages, the acceptance of natural gas vehicles in fleet markets, the relaxation or waiver of fuel emission standards, the inability of fleets to access capital or government funding to purchase natural gas vehicles, the sufficiency of bio methane for use in our vehicles, the development of competing technologies as well as other risk factors and assumptions that may affect our actual results, performance or achievements or financial position discussed in our most recent Annual Information Form and other filings with securities regulators. Readers should not place undue reliance on any such forward-looking statements, which speak only as of the date they were made. We disclaim any obligation to publicly update or revise such statements to reflect any change in our expectations or in events, conditions or circumstances on which any such statements may be based, or that may affect the likelihood that actual results will differ from those set forth in the forward looking statements except as required by National Instrument 51-102.

More Information

Westport
(Investor Inquiries)

Darren Seed

Vice President, Investor Relations and Communications

T 604-718-2046

invest@westport.com

www.westport.com